Makes GetBuildTime behave identically on all build types.

build/config/BUILD.gn

Index: build/config/BUILD.gn
diff --git a/build/config/BUILD.gn b/build/config/BUILD.gn
index b9208ac302ea8e4e7f764b120dbbb0a69476513f..abd6c2f09d97144ac1b22973600d040ba3392238 100644
--- a/build/config/BUILD.gn
+++ b/build/config/BUILD.gn
@@ -3,7 +3,6 @@
 # found in the LICENSE file.
 
 import("//build/config/allocator.gni")
-import("//build/config/build_metadata.gni")
 import("//build/config/chrome_build.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/crypto.gni")
@@ -80,9 +79,6 @@ config("feature_flags") {
   if (use_browser_spellchecker) {
     defines += [ "USE_BROWSER_SPELLCHECKER=1" ]
   }
-  if (dont_embed_build_metadata) {
-    defines += [ "DONT_EMBED_BUILD_METADATA" ]
-  }
   if (dcheck_always_on) {
     defines += [ "DCHECK_ALWAYS_ON=1" ]
   }